The polar vortex is bulging far down into the United States. bringing a mass of sub zero Arctic air temperatures into the Great Lakes region and forcing record low temperatures and freezing air into many southern States including Texas and northern Florida, as well. While current temperatures are as low as -19 degrees in Minneapolis and -18 degrees just north of Chicago, down south in San Antonio and Houston, Texas, freezing surface temperatures are reported as low as 31 degrees. Frigid temperatures are considered dangerous in many parts of the U.S. this evening. Freezing temperatures are expected to continue for the next several days and not climbing substantially until later on in the week.

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Chris has written a number of medical manuals, including a highly regarded "Beryllium Health Surveillance" Medical Management Manual, while working in an occupational medicine office. Before that, he was on the Alpine Rescue team for half a decade, and has written a number of procedures and plans for medical operations relating to occupational medicine. He has written a number of screen plays and published documentaries. Recently, he wrote a heart health article for Climbing Magazine titled, "Luckiest Man Alive and the Widow Maker." That article is still present on www.climbing.com assessment, and project management. He has a BA in Communication from CU Boulder, a Master of Arts in Policy and Management from University College, University of Denver, and an Associate of Science degree from Front Range Community College.

It's summer, it's hot, and you've got to take care of yourself. Know the signs, symptoms, and differences between Heat Cramps, Heat Stroke, and Heat Exhaustion so you can keep your cool if you happen to get too hot.